first king who appears in multiple early sources is Bridei son of Maelchon, & kings from later 6th century onwards may be considered historical as their deaths are generally reported in Irish sources.580 - 4 4 Galam Cennalath 584 - 601 17 Bridei ^Maelchon named in Adomnáns Life of Saint Columba; first Pictish king to be more than a name in a list

Cináed mac Ailpín defeated rival kings, winning out by around 845–848. He is traditionally considered first "King of Scots", or of "Picts & Scots", allegedly having conquered Picts as a Gael, which is turning history back to front, as most modern scholars point out, he was actually King of Picts, & terms King of Alba & even later King Scots were not used until several generations after him.858Cináed Mac Alpine of Cenél nGabráin of Dál Riata862 Domnall <877 Causantín ^<878Áed <889 Giric ^^Cináed Deposed

878Battle of Ethandun results in victory of Alfred Great over Danish warlord Guthrum & forces Viking forces to accept Christianity in return for English for settlement.
Harald Harfagra completes his conquest & unification of Norway & Orkney Islands, many Norwegians flee to Iceland..

924 Æthelstan Son of Edward Elder & nephew of Æthelflæd. Became King of Mercia on Edwards death (Jul 924), & King of Wessex about 16 days later.27 Oct 939 957 -
9 2 Eadgar Nephew of Æthelstan. Seized control of Mercia & Northumbria in May 957, before succeeding to reunited English throne in Oct 959.8 Jul 975

Ealdormen & Earls of Mercians
957

chief magnate of Mercia as an English province held title of ealdorman until 1023/32, & earl thereafter. Both offices were royal appointments, but latter in effect became hereditary. Ealdormen of Mercians (nondynastic)
Earls of Mercians (descendants of Leofwine) 957 -
83 26 Ælfhere Appointed ealdorman, or prince of Mercians in 957 by Eadgar, when English kingdom was disunited.983 983 -
5 2 Ælfric Cild Brotherinlaw of Ælfhere. Deposed by Æthelred Unready in 985. Killed in battle against Danes in 1016. 985 -
1004 19 Wulfric Spot Possibly ealdorman, or count of Mercians after deposition of Ælfric Cild.